LISTEN | Full interview with Serban Sarbu: As It Happens 6:56 Why the world's largest-known spider web surprised this scientist

Serban Sarbu thought he’d seen it all — until he stepped into a pitch-dark cave that straddles the border between Albania and Greece.

In what's called Sulfur Cave, Sarbu and a team of researchers uncovered a thriving ecosystem, home to over 111,000 spiders entangled in what appears to be the world’s largest spider web.

“To find so many spiders in one spot in a cave, that was the first surprise,” Sarbu, a scientist who studies caves, told host Nil Köksal.

“So [then], you ask yourself the question, ‘Why are they there? What's, in fact, keeping them alive?’”

The discovery was recently published in the journal Subterranean Biology.

Caves, he expl

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